This washer acts as a distance between the intersecting beams. Now you can connect wooden square beams, screw HDPE boards, planks, plywood and other flat elements to them. An additional advantage is the ability to combine two elements at any angle. It prevents jamming by eliminating dangerous, narrow inter-bubble spaces. Available size - Φ40 mm for flat surfaces. They are produced in 5 basic colors - yellow, red, blue, green, black; but at customer's request we will make any other color. Material: Polyamide PA.